Storage battery for electric tools



FIG. 1 is a rear, bottom and left side perspective view of a storage battery for electric tools showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top plan view thereof; and

FIG. 7 is a bottom view thereof. 

The ornamental design for a storage battery for electric tools, as shown. 